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Stephanus
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[Mentor's note: This post has been moved to it's own thread.]
Dear PF Forum, can I ask a random question here?
1. Is the speed of light defined by the speed of photon?
2. How do we measure EM wave speed? Just by putting transmitter and receiver and divide the distance by time?
3. If EM wave has no photon, is EM wave speed the same as light speed? or at the universe maximum speed?
4. If photon has mass, is light speed different than the universal speed limit? Altough only some tiny tiny percent?
I have asked in previous thread about the speed of photon.
If different cars have different speed (although the same car can have different speed when it's in a garage compared to when it's in highway or traffic jam)
5. Does photon always travel at the speed of light? For example, today the same photon travels at c, and yesterday the same photon travels at 0.5c or even 100 kmh.
6. Does neutrino always travel at the speed of light?
![Smile :smile: :smile:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
The quote suggests that there are different kinds of neutrino type, is that right? Altough we have many types of atom, we only have 1 type of proton, right? I know this question should belong to particle physics, perhaps just yes/no answer will suffice before it is deleted by the admins![Smile :smile: :smile:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Dear PF Forum, can I ask a random question here?
1. Is the speed of light defined by the speed of photon?
2. How do we measure EM wave speed? Just by putting transmitter and receiver and divide the distance by time?
3. If EM wave has no photon, is EM wave speed the same as light speed? or at the universe maximum speed?
4. If photon has mass, is light speed different than the universal speed limit? Altough only some tiny tiny percent?
I have asked in previous thread about the speed of photon.
If different cars have different speed (although the same car can have different speed when it's in a garage compared to when it's in highway or traffic jam)
5. Does photon always travel at the speed of light? For example, today the same photon travels at c, and yesterday the same photon travels at 0.5c or even 100 kmh.
6. Does neutrino always travel at the speed of light?
7. I know I should have googled it, just in case someone can give me yes/no answer, then I google itOrodruin said:We actually only have an upper limit and mass squared differences, which means that the lightest neutrino technically could be massless.
The quote suggests that there are different kinds of neutrino type, is that right? Altough we have many types of atom, we only have 1 type of proton, right? I know this question should belong to particle physics, perhaps just yes/no answer will suffice before it is deleted by the admins
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